doehrer



B. DOEHRER` AUTOMATIC TIRE PUMP.

APPLICATION man JULY 3,1918.

Patented Mar. 309 l9.2

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AUTOMATIC TIRE PUMP.

APPLICATION FILED JULY 3,1918.

1,335,562, Patented Mar. T920.,

2 SHEETS- T 2.

Il flhi tij? j; ,IEP/m mem 5351A dumm i UNITE@ BERNHARDT DOEEBEB', OF BRDGEPORT, CQNNECTICUT.

assauts.

Application filed July 3, 1918.

To all 'whom t may concern:

Be it known that l, BERNHARDT Donemus, a citizen of the United States, and resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful improvements in Automatic Tire-Pumps, of which the following is a specification.

This invention relates to an automatic tire pump for vehicles and for other purposes.

rlhe organization of the-'invention comprises a casing that can be secured to a wheel for a vehicle and which rotates therewith. lit-hin the casing are fastened a pair of compressor cylinders. .a counterweighted cam disk is slidably supported in the casing and a walking beam oscillating, by coacting with the cam disk provides means for operating the cylinders to produce compressed air. By this means the tube of the tire of the wheel is supplied with compressed air when the wheel is turning. At a predetermined pressure the compressors stop operating and the appurtenances produce an automatic tire pump for ini'iating the tubes of tires.

ln the accompanying drawings which er;- emplify the invention, Figure l represents a front view of the tire pump casing; Fig. 2 shows a view similar to Fig. l with some of the parts removed and a partial section of Fig. 3 on the' line 2, 2; Fig. 3 is a partial section of Fig. l on the line 3, 3; Fig. 4 represents a partial section of Fig. 2 on the liner 4, 4;- Fig. 5 shows a partial section of Fig. 2 on the line 5, 5; Fig. 6 shows a front view of the'tire pump connected to a wheel of a vehicle; Fig. 7 represents a left hand side view and partial section of Fig. 6 on the line 7, 7 and a fragmentary portion of the tire of the wheel with its tube; Fig. 8 is a fragmentary portion of Fig. 6; Fig. 9 shows a partial section of Fig. 7 on the line 9, 9; Fig. l0 shows a front view of a fragmentary portion of a wheel of a vehicle with the pump located therein: Fig. 1l shows a partial. section of Fig. l0 on the line 11, 1l with a fragmentary portion of the tire of the wheel with its tube; Fig. 12 represents a front view of a modification of the pump secured to a stationary support and Fig. 13 shows a left hand side view of Fig. l2.

The pump comprises the cup shaped casing 20, having the cylindrical side wall 2l with the annular flange 22 at its open end and the bottom wall 23 with the elongated.

Specification of Letters Eatent.

AUTOMATC TIRE-PUMP.

Patented lll/liar., 36, i926.

Serial No. 243,177.

openings 24. l cylindrical central wall 25 extends from the bottom wall 23 and forms thc cylindrical central opening 26.

lllalls 3l and 32 extend from the cylindrical wall 2l and form the air reservoirs '33 and 34. :l cover 35 is provided for each of the air reservoirs and is held in place by the bolts 36. i boss 37 is formed with the bottom wall 23 and an opening 36 with the cover 39 is formed with the side wall 21. :Screw plugs 46 are provided for threaded openings in the side vwall 2l. .fir cam disk 4l is rotatably supported on the annular flange 22, and has formed therewith the cam groove 42, eccentric with the cylindrical wall A counter weight groove 43 in the cam disk 4l has fastened therein the counterweight 44 with the bolts 45. rThe counter weight groove 43 is formed to bring its central portion diametrically opposite that portion of the cam groove 42 which is the greatest distance from the center of the central opening 26. An annular cover 47 is 'fastened to the open end of the casing 2O by means of the bolts 48. rlhe cover 47 maintains the cam disk 4l in place on the annular flange 22. A pair of compressor cylinders are indicated at 50 and 51, each having foot 52, these feet being` secured to the bottom wall 23 by means of screws 53. it the closed end of each of the cylinders is located a spring controlled inlet valve 54 and a spring controlled outlet valve 55. rlhe latterL operate in the valve chambers 56. Pipes 57 connect the valve chambers 56 with the air reservoirs 33 and 34. ln the cylinders 50 and 5l respectively'reciprocate the similar pistons 59 and 60. ln the boss 37 is secured the pivot pin 63 on which is supported the walking beam having the single arm 64 on one side and the pair of arms 65 and 66 on the other side. rl`he arm 66 terminates in a boss 67 on which is rotatably supported the roller 68. rFhe roller 68 engages the canA groove 42. At the ends of each of the arms 64 and 65 is pinned one end of a connecting rod 69 by means of the pins 70. lhe other ends of the connecting rods are pinned to the pistons 59 and 60 by means of the pins 7l. From the air reservoir 33 leads the piping and from the air reser-` voir 34 leads the piping 76. Piping 7 7 connects the piping 75 and 76. Piping 78 leads from the piping 77 and to which is connected one end of the tube 7 9 that leads to the charging pipe 80 of the inner tube 80- of. the tire. Piping leeds 'from the piping 7i' and to which is connected pressure gage S1. i safety vulve also is connected with piping 77.

Referring particularly to Figs. 6, T. S- and i), the` spokes ot :i i'e-hicle nre indicated it S5 with the 'telly S52" md un :iXle do. To the bottoni we l L ol the casing 20 is bolted the annular plate 88 by means et the bolts of). The plate 8H hns e centrar! opening 00 to enable it to clear the hul, oi' the Wheel oi" the vehicle :1nd lies also termed therein the elongated openings .01. @n Ytour oi' the spokes S5 is fastened :i clamping bracket 95 which luis 'termed :it one end tlicrcot :i hef. ing block Elf-.L :ind through the` other end eX- tends :i clmnping screif 95 by ineens o'tivhich letter the bracket 025 is 'fastened to the spoke. From ee-.ch block 9i extends n. stud 00. fr .'vnsher 0i' encirclcs auch sind 9G and n nut 0S clumps the plate 515] to 'the hlock 94.

ln Figs. 10. 11 and i12 the tire pump is incorporated in the anni center oi" the wheel hinting the spokes 10i rThe letter ire secured betii'ecu the annuler plates 101. :ind i0@ that constitutes n portion of the hul) o the wheel hnvino the telly 102.n :ind the :istie 103. The pipinf` i8 extends trom the cylindrical side Well 2l ot the tire pump through one of the spokes 100 und the telly 102 to the tube 102 oic the tire. rllhe bottoni well Q3 is 1oolted to the plate 101 hy nies -s ot' the bolts 105. The cover for the casing 20 shown :it 106 has the central opening 10T eno covers the cern disk 11.

in Figs. 12 and 13 the pump is adapted to he used with e stationery support which lutter is indicated at 110. The 'bottoni Wall oi? the casing 20 is bolted to the sup-port 110 hy means of the bolts 112. The annular cover 1 4 'tor the fztsing is secured. in place by ineens oit the 1oolts 115. The com disk is indicated zit 11G and hns e. Nriding tl'ieret'rom the spur g 118. hi' moans of be tui-mid. liu 119 4 L!" which. the cem disk een with the projecting pins 120 extend from the cem disk 11G by means oi which the czim disk 116 can. also he turned.

To operate the pump end. referring purticulztrly to Figs. 1 to 9 inclusive when the Wheel having the spokes turns. the ci 'ig Z0 with ell ot the other elements except the cem diik Lt1? :also turns. The cem disk remains itt rest tor pressures heloiv predetermined pressure oi the :tir compressed in the cylinders 59 :ind 60 hy re son of' toc effect of the VWeight of the countcriveight 441 erceeding the friction between theY cum disk 41, the annuler izinge 22, the :innuhtr elf?. the roller G8 ond the friction oi the pistons 59 and 00 in their cylinders. lluring the rotations ot the casing 20 the roller 68 travels in the cani groove 4.2 which cruises the walking benin having the arms Gil, 65 and 66 to oscillete. rhereoy the pistons 59 sind 0) through the intervention oi the connecting rods G9 reciprocate. Air drawn into the cylinders 50, 51 through the inlet vulves und discharged from said cylinders through the outlet valves 55 :ind forced into the valve chambers 5G. rl`he compressed lir then iiou's through the pipes 5"? into the 'eservoirs 33 end 34.

Fiping 75, i0 and TT leed the compressed air to the piping T8 end 80. The tube 7S) conducts the air from the piping .78 to the inner tube 80a ot the tire to charge the seme. rthe piping 80 conducts the sir to the pres-:- sure gage 81 whereby the pressure ot the wir is it ell times indicated. lThe safety valve S2 releases the pressure When it exceeds n predetermined amount. Also is soon :is the prcdetermined amount oi pressure is exceeded the pressure ot the roller 68 on the sides et the cem groove 42 exceeds the e'tlect oi' the counteriveight le and the cem disk 41 turns with the casing 20, the pistons 59 and 60 stop reciprocating :ind the pumping oit tir is stopped.

The predetermined pressure at which the pumping ot air is stopped con he varied by using counter Weights of different sizes and Weights.

The operation ot the modiiicetion shown in Figs. 10 and 11 is similar to that described. ln the modification shown in Figs. 12 and 13 the casing 20 remains stationery and the disk cam 11G is turned by rotating the spur gear 118 with e rotating geen' not shown7 or seid disk cam is turned loy applying an operating handle to the pins 120.

Hzving described my invention what I desire to secure hy Letters Patent und claim is:

1. ln si pump the combination of si compressor cylinder7 e piston in the cylinder, means to revolve the cylinder. a. pair of arms simultaneously revolving With the cylinder, e normally stationary cem disk oscillating one of seid arms during the revolutions of the cylinder and a. connecting rod connecting the other firm and said piston7 thereby reciprocating the latter, and piping to lead compressedv air from the cylinder to the tuhe of a tire.

2. n a pump the combination of ai cesing, means to connect the casing to a rotat/inf` element, pair of compressor cylinders in the casing and Jfastened thereto. fi piston in each cylinder. Walking Tneem having three .firms pivoted in the casing, a connecting rod for each piston and With one end pinned thereto. the other end of each connecting rod pinned to one of a. pair of said firms. :i normally stationery cem disk having a cam groove supported in the casing. roller carried by the third :irm of seid Walking beam engaged by said cem groove sind piping 'For 'the outlet ends of the compressor cylinders to' lead compressed air from said cylinders.

3. In a pump the combination of a easing having a central opening to admit the hub of a vehicle therethrough, means to clamp the easing to a wheel of the vehicle, a pair oi Compressor' cylinders in the Casing and 'fastened thereto, a piston in each cylinder, a normally eounterweighted cam disk having a groove slidably supported in the easing, a walking beam pivoted in the easing, connections between the walking beam and the groove to oscillate the beam and connections between the walking beam and the pistons to reciprocate the latter during the oseiiiations of the walking beam.

il. ln a pump the combination of a casing having a central opening, means to secure the easing to a vehicle, a pair of compressor cylinders in the Casing and fastened thereto, a piston in each cylinder, a walking beam with three arms pivoted in the easing, oonneeting rods connecting the pistons and a pair oi said arms, a cam disk having a Cain groove siidably supported on an annular Harige of the easing, a oounterweight Jfor the cam disk, a roller pivoted on the third arm of the walking beam and engaged by said cam groove, a pair of air reservoirs in the easing, a pipe leading from each oompressor evlinder to one of said reservoirs and piping leading from the reservoirs to the tube of a tire.

ln a pump the combination of a easing having a central opening to allow7 the insertion of the hub of a wheel of a vehicle, a pair of Compressor cylinders in the easing and revolving therewith, a piston in each Cylinder, a counterweighted Cam disk having a Cam groove slidably supported in the easing, a walking beam pivoted in the easing, connections between the walking beam and cam disk, connections between the walking beam and the pistons, a plate bolted to the outside of the easing and brackets connecting said plate and said wheel.

Signed at borough of Manhattan, city of New York, in the county of New York and State of New York, this 27th day of J une,

BERNHARDT DOEHRER. Witnesses:

A. A. DE BONNEVILLE, JACK NILE. 

